Process for pumping gaseous helium at cryogenic temperatures by

Details Process for pumping gaseous helium at cryogenic temperatures by Process for pumping gaseous helium at cryogenic temperatures by

1995-08-22

1997-05-13

Caposella, Ronald C.

Refrigeration

Storage of solidified or liquified gas

Liquified gas transferred as liquid

62505, 418 552, F17C 1300

Patent

active

056281943

ABSTRACT:
Application of a positive displacement pump to the pumping of helium at very low temperatures. Positive displacement pumps, formed from mobile components (35, 36), which deliver gas volumes to pumping chambers, have the advantage of operating under satisfactory conditions for significant temperature, pressure and gas flow rate variations. They are therefore preferred as compared with the hitherto used centrifugal pumps and have means enabling them to operate at very low temperatures.

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